WO2024041946A1 - Appareil à ondes de choc comprenant un dispositif à double soupape - Google Patents

Appareil à ondes de choc comprenant un dispositif à double soupape Download PDF

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Publication number
WO2024041946A1
WO2024041946A1 PCT/EP2023/072553 EP2023072553W WO2024041946A1 WO 2024041946 A1 WO2024041946 A1 WO 2024041946A1 EP 2023072553 W EP2023072553 W EP 2023072553W WO 2024041946 A1 WO2024041946 A1 WO 2024041946A1
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WO
WIPO (PCT)
Prior art keywords
projectile
time
switch
applicator
valve
Prior art date
Application number
PCT/EP2023/072553
Other languages
German (de)
English (en)
Inventor
Rafael Storz
Markus Belau
Arvid Kühl
Lukas HONSELL
Felix Gremlich
Thomas Glenzer
Original Assignee
Storz Medical Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Storz Medical Ag filed Critical Storz Medical Ag
Publication of WO2024041946A1 publication Critical patent/WO2024041946A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
    • A61B2017/00544—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated pneumatically

Definitions

  • the invention relates to a device for treating the human or animal body with mechanical pressure waves, which are generated by striking an accelerated projectile on an applicator.
  • Mechanical pressure waves are used to treat the (human or animal) patient, which are coupled to the patient's body by placing an applicator and are generated by a collision of an accelerated projectile with the applicator.
  • the applicator does not necessarily have to be in one piece, but can also be composed of a number of different parts or materials.
  • a technique for accelerating the projectile that has proven itself in practice and has been described many times is pneumatic.
  • a volume on one side of the along a movement path e.g. B.
  • a pneumatic overpressure is coupled into a piece of pipe, movable projectile.
  • a switching valve is used for this purpose, which is connected to a pneumatic supply, in particular a compressor with an adjustable output pressure, and whose pulse accelerates the projectile from an end of the movement path distal to the applicator towards the applicator.
  • the pneumatic action is switched off when the proximal end of the movement path is reached, i.e. when it hits the applicator.
  • the present invention is based on the object of specifying, on this basis, a device of the type described with a pneumatic device for projectile movement that is improved with regard to the back and forth movement of the projectile.
  • the device according to the invention has, as part of its pneumatic device, a double valve device for acting on the projectile in both directions, i.e. towards the applicator and vice versa away from it in the return direction, i.e. z. B. the combination of a first and a second valve.
  • This typically occurs multiple times and iteratively in a sequence.
  • the time phases in which the projectile is pneumatically acted upon so that it moves in the direction of execution, i.e. e.g. B. the switch-on phase of a first valve is referred to below as the first switch-on time and conversely as the second switch-on time, a time phase of reverse loading of the projectile.
  • the device should be designed (i.e.
  • a control device present therein should be designed so) that a second switch-on time only begins after the first switch-on time has ended and a distance time has expired. So there is a non-zero gap time between the two valve opening times.
  • the first switch-on time can be ended well before the projectile hits the applicator and the second switch-on time can begin, for example, immediately after the impact. Then not the entire available time between the start of movement of the projectile and the impact on the applicator is used for acceleration when accelerating pressure is applied, but only a first part of it.
  • the impact speed of the projectile could be reduced without having to lower the accelerating pneumatic pressure. It can e.g. B. it may be desirable to leave this at a higher value for the fastest possible return (using the second switch-on time) than is currently required for acceleration towards execution.
  • the impact speed can be controlled by the controller in this way, even independently of a change in pressure (e.g. at a constant pressure).
  • the distance time can also lie completely or partially after the collision. Then, by delaying the start of the second switch-on time after the collision, e.g. B. a backward movement that is too fast or too violent Speed at the end of the return movement can be prevented without having to lower the accelerating pressure (for execution).
  • the collision itself according to the laws of conservation of momentum, causes a certain acceleration of the projectile in the return direction.
  • both aspects can be combined, namely part of the distance time before and another part of the distance time after the collision.
  • the distance time has been considered after a first valve opening time (adjacent to the distance time) and before a subsequent second valve opening time.
  • the variation of the interval time between a preceding (adjacent) second and a then following first valve opening time can also be varied.
  • such a distance time can be relevant due to a delayed (and varied in terms of delay) onset of the first valve opening time during acceleration towards execution.
  • the projectile movement could initially begin exclusively through a “reflection” at the distal end of the movement path, i.e. through a residual momentum of the projectile after a collision with a device part there.
  • the projectile can then move in the direction of execution, but is additionally accelerated when the first valve opening time begins.
  • the movement part (in the direction) without pneumatic acceleration through the first valve can also be at the beginning of the movement in the direction (and of course the first valve opening time can end before the collision with the applicator).
  • Another example relates to such a distance time or a portion of such a distance time at the end of the return movement and before reaching the distal end of the movement distance.
  • a variation of the distance time can have an (indirect) influence on the speed of the projectile in the subsequent collision with the applicator, namely because the “reflection” just mentioned at the distal end depends on the projectile speed Reaching this end can lead to a different residual impulse at the beginning of the outward movement.
  • Another example concerns a variation of both distance times, e.g. B. complementary to each other.
  • one of the two interval times can be extended at the expense of the other.
  • valve opening time used here basically includes both the temporal duration and the position relative to temporal reference points, in particular relative to the other valve opening time. The term therefore includes the start and end of the valve opening time as well as the distance between them, unless the duration or only a start or end time is explicitly mentioned below.
  • the two valves can be controlled (preferably independently of one another) by the control device.
  • a uniform valve can also be used, which is referred to here as a “combination valve” and which, depending on the activation by the control device, has at least two switching states, namely a first for acting on the projectile in the direction of the applicator and a second for acting on it in the reverse direction. While the combination valve is in the first switching state, there is a first valve opening time, and in the second switching state there is a corresponding second valve opening time.
  • the pneumatic connection to be acted upon in the other switching state is preferably ventilated by the combination valve, so that e.g. B. during the forward movement on the side of the projectile proximal to the applicator there is approximately ambient pressure and in In contrast to the conventional approach with a counter-pressure chamber, there is no dynamic pressure increasing from collision to collision.
  • At least one of the two valves is preferably a “two-way valve”, which accordingly carries out ventilation unless it is switched to apply pneumatic pressure.
  • further switching states are not excluded and the valve is not necessarily limited to exactly two switching states.
  • ventilation means a pneumatically highly conductive connection to the outside atmosphere or a reference pressure volume that essentially corresponds to this. So it's not about deliberately delaying the flow of gas and excess pressure in the sense of throttling.
  • the device could also be used, for example.
  • B. have a certain pneumatic leak and, in the absence of pneumatic pressure, carry out a throttled ventilation in one way or another, in a quasi-creeping manner. However, this option is less preferred.
  • the first switch-on time is variable in length for at least two control states with different interval times, i.e. e.g. B. with a fixed proportion of the distance time after the collision with the applicator (including zero).
  • the second switch-on time can also be of variable length, but e.g. B. in the case just described, a fixed proportion of the distance time after the collision with the applicator can also be constant, preferably in terms of duration and / or start and end in relation to the reference.
  • devices of the type considered here typically carry out a large number of acceleration, collision and return transport processes of the projectile.
  • the corresponding repetition frequency of such periodic operation can be regularly adjusted.
  • an iterative (not necessarily periodic) operation and a corresponding design of the device are preferred, whereby the corresponding sequence does not necessarily have to begin with a movement in the execution.
  • such a sequence can begin with a first pneumatic pressure pulse to move the projectile in the backward direction into its distal position relative to the applicator in order to establish defined initial conditions.
  • magnets at this distal end of the movement path of the projectile are already known in the prior art, with which the projectile is to be fixed.
  • a projectile could come loose from this fixation as a result of impacts and such fixation could of course also be dispensed with.
  • the explanations do not necessarily refer to every individual movement process during such a movement sequence.
  • the operating conditions can also be changed during a sequence, so that the distance time described may not even exist for some of the movement sequences in the sequence.
  • the device and in particular the control device can be designed so that in certain further control states there is no such gap time but instead there is an overlap time between the first and the second switch-on time or vice versa (which is different from zero and thus the case of a gap time of zero is).
  • an overlap time in certain control states (with existing others Control states with gap time) results in an additional degree of freedom. For example, this can be used to control the impact speed of the projectile when it hits the applicator by changing the overlap time.
  • a counterforce acts on the projectile in addition to the pneumatic force accelerating in the direction of execution.
  • this can be approximately the same size and virtually neutralize the acceleration.
  • the projectile is accelerated to a larger or smaller speed, which it then achieves during the overlap time, for example. B. approximately maintained.
  • One advantage may be that the impact speed of the projectile can be controlled more precisely and/or more easily than in the conventional comparison case, in which the opening time of the (single) switching valve and of course the effective pressure were important.
  • Real switching valves have long opening and closing times, so they do not open and close instantaneously. This applies especially to the comparison between the closing time and the opening time, for example.
  • the opening process is supported magnetically and optionally pneumatically using the pressure to be switched
  • the closing process is supported by a when opening tensioned spring occurs.
  • there can be design-related and aging-related deviations as well as different aging behavior between the opening and closing times (here opening time in the sense of the opening process).
  • the period of time relevant for the projectile acceleration is determined by the time difference between two valve opening processes (first of the first and then the second valve).
  • the overlap time is at the end of the second valve opening time.
  • the pneumatic projectile acceleration in the direction of the applicator only becomes significant at the end of the overlap time, so that it is the remaining portion of this first valve opening time after the overlap time and thus the difference between two valve closing processes (first of the second and then of the first valve). In both cases it is the time difference between similar valve movements.
  • age-related deviations in particular are significantly less noticeable (if, for example, the closing time shows stronger aging influences than the opening time), because these influences are at least partially compensated for by the difference formation described.
  • Another (alternative or additional) aspect can be, on the one hand, to work with a relatively large pneumatic pressure in order to achieve a rapid Return and thus also achieve a high operating frequency, but on the other hand it is not necessary to use high impact speeds corresponding to this high pressure (if such an acceleration pressure is present during the entire forward movement). High intensities are not always desirable for therapeutic reasons and are regularly associated with increased stress on the patient due to pain or other irritations.
  • the overlap time can be partly before and partly after the projectile hits the applicator or partly before and partly after reaching the point furthest away from the applicator, as will be explained in more detail in connection with the exemplary embodiment.
  • the described compensation of the accelerating force can be carried out completely within a first switch-on time by simultaneity of the first and second switch-on times (i.e. applying pneumatic pressure to both sides of the projectile). Then e.g. B. the projectile can be returned in a manner already known from the prior art. In principle, an additional second switch-on time (which is separate from the second switch-on time during the first) could even be used for the feedback.
  • one of the two switch-on times can be of constant length when comparing two control states with different overlap times (in this case including zero).
  • this preferably applies to this first switch-on time and in the other case correspondingly to the second switch-on time.
  • the differences in the overlap time result from different lengths of the other valve opening times that overlap with it or the temporal relationships between the two valve opening times.
  • the respective other valve opening time between two such control states with different overlap times is variable in duration (e.g. for all or one Part of the control states measured from the start of the earlier switch-on time could have the same starting time).
  • the proportion of the overlap time before the projectile impacts i.e. during the forward movement of the projectile from a distal location (relative to the applicator) to the applicator, is significantly larger than the proportion or period of time accounted for by the return movement.
  • This preferably applies to all control states with an overlap time.
  • the overlap time exists exclusively during the forward movement.
  • the pneumatic device can have a connection for supply from a pneumatic line network, e.g. B. in a hospital, or from a compressed gas bottle.
  • a pneumatic compressor is preferred, with which the device according to the invention is locally independent and more mobile compared to a compressed gas bottle.
  • Pneumatic compressors are already known in connection with such devices.
  • the invention offers the special aspect of not necessarily having to change the supply pressure in different control states with different impact speeds of the projectile. In other words, the compressor can run at the same speed in such different control states.
  • Typical impact speeds are in the range between 2 m/s and 30 m/s, but also in less rapid or non-changing conditions. What is particularly important for impact physics is the impact impulse, which for typical projectile masses can be between 1 g and 10 g, preferably between 2 g and 5 g, and thus in a range from 2 gm/s to 300 gm/s. A range between 10 gm/s and 150 gm/s is preferred.
  • the device has a measuring device with which the passage of the projectile can be measured at a point along its path of movement.
  • This measuring device can be coupled to the control device.
  • the passage of the projectile can be recorded shortly before impact or virtually when impacting the applicator, so that the switch-on times can be coordinated accordingly (particularly with regard to their start and end) to the end time of impact.
  • Such a recording can e.g. B. done optically, for example through a light barrier or the like, but preferably inductively using at least one measuring coil. This can detect the projectile through residual magnetism of the projectile or purely inductively (by changing the leakage inductance).
  • the invention is explained in more detail below using exemplary embodiments, whereby the individual features within the scope of the claims can also be essential to the invention in other combinations.
  • Figure 1 shows a perspective view of a device according to the invention, with a central housing part being omitted for the sake of clarity;
  • Figure 2 shows a longitudinal section through the device from Figure 1 in the right-left position reversed compared to Figure 1;
  • Figure 3 shows a schematic diagram of the handpiece with an associated base device
  • Figure 4 shows a sequence of schematic time curve diagrams 4a) to f) to explain the functionality
  • Figure 5 is a schematic representation of a combination valve to explain an alternative exemplary embodiment to Figures 1 and 2;
  • Figure 6 shows a sequence of schematic time curve diagrams 6a) to e) to explain further control states in addition to Figure 4;
  • Figure 7 shows a further schematic flow diagram to explain the periodic operation
  • Figure 8 shows a recurring sequence of two different projectile speed levels in direct succession, with a high speed pulse being immediately followed by two low speed pulses;
  • FIG. 9 shows a control sequence for the activation of the valves V1 and V2 according to the sequence of two different projectile speed levels shown in Figure 8;
  • Figure 10 shows a higher temporal detail of the first 300 ms from the control sequence of Figure 9.
  • Figure 1 shows a handpiece of a device according to the invention in a perspective view with pneumatic valves pointing forward-left, namely a first valve 1 and a second valve 2.
  • a pneumatic supply connection 3 On the right you can see a pneumatic supply connection 3 and on the left two screw rings 4 and 4, each grooved on the outside for easier handling 5 for holding the applicator 6, which will be explained in more detail below.
  • This can just be seen on the far left in Figure 1 with its surface facing the patient and is also shown in Figure 2. It could also be constructed in several parts.
  • this plurality of tubes is surrounded by a housing cover 11 shown in FIG. 1 by the line under the pipeline 10 and the two lines above the projectile guide tube 7. This housing cover 11 runs in the rear area in FIG. 1 and only covers part of the circumference.
  • the housing cover 11 can therefore serve as a handle for practical handling.
  • the spacer 13 stabilizes the structure and mechanically connects the two ends of the handpiece.
  • a flexible compressed air supply line leading from a pneumatic compressor to the device is not shown here and should be connected to the connection 3 already mentioned.
  • an electronic control line (52 in FIG. 3) from an external control to valves 1 and 2 is not shown, which can be designed to be uniform with the compressed air supply line.
  • Figure 2 shows a longitudinal section along an imaginary central longitudinal axis of the already mentioned cylindrical shape of the overall device, which is also a central longitudinal axis of the projectile guide tube 7.
  • the projectile 8 is shown on the right in Figure 2 and is therefore in contact with the applicator 6, which is held by the screw ring 4 and 5 described in a manner known per se.
  • the applicator 6 is elastically mounted in the axial direction with a bellows-like elastomer ring 14 and pneumatically sealed with a further elastomer ring 12.
  • Figure 2 shows an inner channel 21 on the left, which connects the pneumatic connection 3 to the first valve 1.
  • the first valve 1 can therefore switch a supply pressure present at the pneumatic connection 3, depending on the control, to a radial channel 22, which opens under a damper element 23 and is therefore connected to the internal volume of the projectile guide tube 7.
  • the projectile is acted upon or accelerated in the direction of the applicator 6 via this channel 22 during a first switch-on time. Regardless of this, the pneumatic supply pressure is passed on to the second valve 2 via the channel 24 and the pipe 10.
  • the pneumatic supply pressure applied via the tube 10 can alternatively be given radially upwards via the channel 25 to a volume surrounding the projectile guide tube 7 (as a slot in FIG. 2). and can be seen under the pipe 7), which leads from the connection of the channel 25 to the right, i.e. towards the applicator 6, and there between the applicator 6 and the end of the projectile guide tube 7 proximal to it is connected to the internal volume of the projectile guide tube 7 (apart from the presence of the projectile 8 there shown in Figure 2).
  • the pneumatic supply pressure can therefore be switchably applied to the internal volume of the projectile guide tube 7 between the applicator 6 and the projectile 8 via the channel 25.
  • the pneumatic connection is somewhat worse as a result of a smaller effective opening cross section than on the opposite side of the projectile guide tube 7, so that delays become noticeable sooner or more strongly at higher air flow velocities (higher frequencies, higher pressures).
  • the second valve 2 can block the connection of the internal volume of the tube 10 to it and ventilate the channel 25 and thus the internal volume of the projectile guide tube 7 to the right of the projectile 8, i.e. connect it to the outside atmosphere via a pneumatically highly conductive connection.
  • the two valves 1 and 2 can therefore apply pneumatic pressure to the projectile from both sides, independently of one another and therefore simultaneously or alternately, or can ventilate the interior of the projectile guide tube 7 on both sides.
  • the reference number 30 in Figure 2 denotes an annular permanent magnet at the distal end of the movement path of the projectile 8 (which coincides with the length of the projectile guide tube 7) opposite the applicator 6.
  • this magnet 30 the projectile 8 made of ferromagnetic material can be moved at this distal end of the movement path can be easily fixed.
  • the projectile can also be returned to this position and optionally also held there, in particular at the start of operation or in the case of a non-ferromagnetic projectile.
  • the permanent magnet 30 can optionally be omitted, especially if the reflections at this distal end, which will be explained later the movement distance should be made possible there even at low impact speeds of the projectile 8.
  • the 31 denotes a point at which the passage of the projectile 8 through the corresponding point of the movement path could be detected with a measuring coil, this point being relatively close to the applicator 6.
  • a slight residual magnetism of the projectile 8 is exploited here, but one could of course also record and evaluate the change in the inductance of the coil 31 using alternating current technology.
  • the collision of the projectile 8 with the applicator 6 can also be determined by using a microphone or motion sensor in the experimental setup.
  • FIG 3 shows a block diagram with the device shown in Figures 1 and 2 at the top right, denoted collectively by the reference number 40.
  • This device 40 is a hand-held mobile handpiece, as is already known from relevant devices from the prior art. It is connected via two lines 51 and 52 to a base station 50, which contains a pneumatic compressor 53 and a controller 54.
  • the compressor 53 is connected to the handheld device 40 via the line 51, namely a pneumatic flexible hose line, and the control 54 via the electrical line 52 (optionally integrated with the line 51), via which the control is applied to the two valves 1 and 1 already mentioned 2 can access and supply it with power.
  • Communication with the handpiece 40 can also take place via the line 52, especially if a control or part of the control is also provided there.
  • the controller 54 also controls the compressor 53 with regard to its speed and of course the switching on and off and, like the compressor 53, is in turn supplied with power by a power supply 55.
  • a pressure control or a pressure control that influences the speed can also be used Control valve must be integrated.
  • the controller 54 is connected to a display 56, which can be installed in the base device 50 or implemented separately from it.
  • the base device 50 is operated via a touch-sensitive screen 56 and/or via an arrangement of keys, not shown here.
  • the user can therefore control the function of the device 40 using such buttons and in any case using the display 56, with the control 54 in particular specifying the opening and closing times and thus also the opening durations of the two valves 1 and 2.
  • Subtasks of the control 54 can also be integrated in the handpiece 40, especially as far as the control of the valves 1 and 2 is concerned.
  • Figure 4 shows schematic time curve diagrams in the individual representations a) to f), which correspond to the table above.
  • both sides of the pipe interior are ventilated (and not pressurized). In Figure 4a) this only applies after the second switch-on time.
  • the length of the first switch-on time is left unchanged.
  • at least part of the second switch-on time lies before the collision, namely in cases a) to e) the entire second switch-on time or the majority, in case f) approximately half.
  • Figures 4a) to f) show the electrical control times of the two valves 1 and 2, i.e. the output signals of the control 54.
  • the valves 1 and 2 are spring-supported solenoid valves that open purely magnetically and close by the force of the tensioned spring, when the magnet is no longer acted upon. The movements of the valve body are therefore slightly delayed compared to the control signals shown, by an estimated 4 ms when opening and 2 ms when closing.
  • FIG. 5 designates the combination valve, which accordingly replaces the two valves 1 and 2 from Figures 1 and 2.
  • Two lines V1 and V2 are shown on the right and left, of which V1 has a connection to the left side (according to Figure 2) of the projectile guide tube 7, e.g. B. via the channel piece 22 (analogous to the first valve 1).
  • the right line V2 means a connection to the right side of the projectile guide tube 7 (analogous to the second valve 2), i.e. z. B. via channel section 25.
  • the upper line is designated in Figure 5 with the keyword “pressure supply” and the symbol “1” (not to be confused with the reference number 1) for the first valve;
  • the lower line connection with the keyword is analogous “Ambient pressure” and the symbol “0” inside the figure means a ventilation opening.
  • the pneumatic compressor 53 (FIG. 3) runs at a predetermined fixed operating frequency in which it has a maximum efficiency.
  • the pneumatic compressor can be particularly effectively insulated against vibrations and noise at a given operating frequency.
  • control device 54 can change the impact speed and also the time interval between the collisions between the projectile 8 and the applicator 6 from one individual process to the next. It can therefore influence the physics of collisions much more quickly and variably and, in particular, is not tied to periodic processes.
  • Figure 6 shows a sequence of five individual schematic time curve diagrams 6a) to 6e), in each of which the opening and opening curve labeled T1 Closing process of the first valve 1 and the curve labeled T2 analogously denotes the opening and closing process of the second valve T2.
  • the increased part of the curve corresponds to the first/second switch-on time.
  • the first switch-on time for all five control states on the (arbitrary) time axis in the horizontal begins at 0 ms and ends at 13 ms.
  • the start of the second switch-on time shifts gradually from approximately 2.5 ms in Figure 6a) to approximately 7 ms in Figure 6e), whereas the second switch-on time ends at approximately 18 ms in all five representations.
  • there is an overlap time in all control states namely from 3 ms to 13 ms in Figure 6a) up to from 7 ms to 13 ms in Figure 6e), with this overlap time decreasing gradually, namely in accordance with the increasingly delayed start of the second switch-on time .
  • the pneumatic action through the second valve 2 is active in all five control states with regard to the return of the projectile 8.
  • impact speeds of the projectile 8 on the applicator 6 are (in this order from a) to e)) 10 m/s, 12 m/s, 14 m/s, 16 m/s and 18 m/s realized. This corresponds to impulses of 30 gm/s to 54 gm/s with a projectile mass of 3 g.
  • the switch-on time of valve 1 is a constant 13.0 ms.
  • the closing time of the second valve also remains constant at 18 ms.
  • the switch-on time of the second valve changes (again in the sequence from a) to e)) from 15.4 ms to 15.0 ms, 14.3 ms, 13.0 ms to 10.9 ms, resulting in overlap times of 10.4 ms, 10.0 ms, 9.3 ms, 8.0 ms and finally 5.9 ms. Accordingly, the switch-on time of the second valve 2 begins delayed by a period of time (increasing from top to bottom) between 2.6 ms and 7.1 ms compared to the first switch-on time.
  • the projectile is accelerated linearly over time before the second switch-on time and then continues to move at approximately the speed reached (neglecting pneumatic flow effects and projectile friction); In fact, the projectile speed will probably increase somewhat less than linearly over time and will decrease slightly due to friction in an approximately force-free state during the overlap time.
  • the projectile 8 is braked in all individual illustrations by the pneumatic action still pending through the second valve, with the projectile in cases 6a) and 6b) after the end of the second switch-on time again being approximately force-free in the above sense, a short distance to the collision.
  • control times could be adjusted so that the overlap time ends approximately at the time of the collision.
  • this could be done by determining the time of the collision using the possibility of a measuring coil 31 in the vicinity of the applicator 6, which has already been illustrated with reference to FIG.
  • the control timing scheme would thus be somewhat more complicated because the first switch-on time would have to be ended at different times (from Figure 6a) to Figure 6e) earlier and earlier).
  • the speed of the projectile return movement could be increased and an even higher repetition frequency range could be achieved in any case for the later individual representations, i.e. for the higher projectile speeds, by also providing for the end of the second switch-on time to be correspondingly different and earlier as the projectile speed increases.
  • FIG. 3 shows control states according to the partial representations in FIG. 4 and further control states according to the partial representations in FIG. 6 just explained.
  • the projectile speed during the collision can be influenced by valve switching times at constant pressure.
  • Figure 7 shows approximately a sequence of three processes corresponding to Figure 4f).
  • the projectile 8 is brought back into the starting position by the second switch-on times shown in dashed lines, in order to then be accelerated again towards the applicator 6 from the first switch-on time that follows.
  • This figure is only intended to illustrate the possible periodicity of control states, which of course also applies in an analogous manner to the other partial representations in Figures 4 and 6.
  • the successive processes can have deviations from one another, so that the impact process can be changed quickly and freely from one repetition process to the next.
  • Figure 8 shows a recurring sequence of pulses with two different projectile speed ranges (at impact), which are identified in Figure 8 by the reference symbols H and L.
  • H and L projectile speed ranges
  • Figure 9 demonstrates in particular that the collision conditions can change significantly from one collision to the next, here by approximately a factor of 3 in the collision speed.
  • the fluctuations within the areas H and L are unintentional and tolerance-related scatters (these are real measured values).
  • Figure 9 shows an example of the control sequence for the valves V1 and V2 in their time sequence in order to achieve the projectile speed sequences, which can be seen in Figure 8. Different overlaps and spacing of pulses relative to each other can be seen.
  • Figure 10 shows the sequence of pulses from Figure 9 in more precise time, so that a repeating sequence can be seen individually here. Here you can see that pulses between V1 and V2 relatively change their distance and overlap.
  • the projectile will reach a stable oscillation state, which can be seen e.g. B. can detect collisions at both ends of the movement path using the aforementioned microphone detection.
  • a calibration curve can be determined in this form.
  • the phase offset can of course be kept constant and the first and/or the second valve opening duration can be changed step by step. In individual cases it could happen that insufficient pressure has been specified for the desired frequency, meaning that even if the two valves are controlled in “anti-phase” no oscillation state with collisions occurs at the ends of the movement path. Then either the pressure must be increased slightly or the frequency must be reduced.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Vascular Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Mechanical Engineering (AREA)
  • Heart & Thoracic Surgery (AREA)
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  • Portable Nailing Machines And Staplers (AREA)

Abstract

L'invention concerne un appareil de traitement par ondes de choc, comprenant : un projectile (8) qui est dirigé le long d'un trajet de déplacement, un applicateur (7) à une extrémité du trajet de déplacement, un dispositif pneumatique pour appliquer une pression au projectile (8) afin du déplacer, le projectile (8) étant conçu pour venir en butée contre l'applicateur (7) afin de générer les ondes de choc. Le dispositif pneumatique présente un dispositif à double soupape (1, 2) pour appliquer une pression sur le projectile (8) dans la direction de l'applicateur (6) pendant un premier temps de mise en marche et dans la direction inverse pendant un second temps de mise en marche. L'appareil comprend également un dispositif de commande (54) et est conçu pour maintenir un temps intermédiaire entre les temps de mise en marche et pour commander une vitesse de butée en fonction du temps intermédiaire.
PCT/EP2023/072553 2022-08-25 2023-08-16 Appareil à ondes de choc comprenant un dispositif à double soupape WO2024041946A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22192132.3 2022-08-25
EP22192132.3A EP4327760A1 (fr) 2022-08-25 2022-08-25 Appareil à ondes de choc pourvu de dispositif à double soupape

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WO2024041946A1 true WO2024041946A1 (fr) 2024-02-29

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EP (1) EP4327760A1 (fr)
WO (1) WO2024041946A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2095843A1 (fr) 2008-02-29 2009-09-02 Storz Medical Ag Dispositif de traitement de substances corporelles biologiques à l'aide d'ondes de pression mécaniques
US20090326425A1 (en) * 2006-12-22 2009-12-31 Gerold Heine Medical Device For Treatment Of The Human Or Animal Body By Mechanical Pressure Waves Or Shock Waves
DE202010009899U1 (de) * 2010-07-06 2010-10-14 Zimmer Medizinsysteme Gmbh Stoßwellenapparatur zur Erzeugung von mechanischen Stoßwellen und Stoßwellengerät
US20110275965A1 (en) * 2008-10-31 2011-11-10 Ferton Holding S.A. Instrument for treating biological tissue, method for generating shock wave-like pressure waves in such an instrument
EP2529679A1 (fr) 2011-05-30 2012-12-05 Storz Medical Ag Manchon d'amortissement du bruit à mettre en place sur un appareil à ondes de pression
US20140350438A1 (en) * 2012-01-31 2014-11-27 Hi Impacts Ltd High pressure ballistic extracorporeal shockwave device, system and method of use
EP2213273B1 (fr) 2009-02-02 2016-07-27 Storz Medical Ag Réglage des paramètres d'un appareil de traitement des ondes de pression

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090326425A1 (en) * 2006-12-22 2009-12-31 Gerold Heine Medical Device For Treatment Of The Human Or Animal Body By Mechanical Pressure Waves Or Shock Waves
EP2095843A1 (fr) 2008-02-29 2009-09-02 Storz Medical Ag Dispositif de traitement de substances corporelles biologiques à l'aide d'ondes de pression mécaniques
US20110275965A1 (en) * 2008-10-31 2011-11-10 Ferton Holding S.A. Instrument for treating biological tissue, method for generating shock wave-like pressure waves in such an instrument
EP2181730B1 (fr) 2008-10-31 2012-08-29 Ferton Holding SA Instrument de production d'ondes de pression de type ondes de choc destiné au traitement de tissus biologiques
EP2213273B1 (fr) 2009-02-02 2016-07-27 Storz Medical Ag Réglage des paramètres d'un appareil de traitement des ondes de pression
DE202010009899U1 (de) * 2010-07-06 2010-10-14 Zimmer Medizinsysteme Gmbh Stoßwellenapparatur zur Erzeugung von mechanischen Stoßwellen und Stoßwellengerät
EP2529679A1 (fr) 2011-05-30 2012-12-05 Storz Medical Ag Manchon d'amortissement du bruit à mettre en place sur un appareil à ondes de pression
US20140350438A1 (en) * 2012-01-31 2014-11-27 Hi Impacts Ltd High pressure ballistic extracorporeal shockwave device, system and method of use

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